© Geodata Australia Data Entry in GeoCadastre  A brief introduction to the data entry process in GeoCadastre illustrating the benefits and efficiencies of grouping parcels either by survey plan or some arbitrary selection.  Parcels remain grouped and are joined as a group

© Geodata Australia The Job  I have selected a multi parcel plan – Deposited Plan dated February 1921  3 more recent subdivision plans have been added to introduce additional control to the whole. The parcels they replace are marked as “Historical” but retained.  The plan is fairly easy to read, well drawn and includes 28 rural parcels, roads, creek traverses and a partly digitised creek  Parcel accuracies vary from 1:17,000 to 1:73,000

© Geodata Australia DP10443(1)

© Geodata Australia DP10443 (2)

© Geodata Australia Job Setup and Start The first action on running GeoCadastre is to setup a job by entering relevant basic information about the job

© Geodata Australia Job Settings Entered Set the essential job detail

© Geodata Australia Set Parcel Properties Plan date is a required field and a default will be inserted if one is not recorded Details can be edited later

© Geodata Australia Beginning Data Entry As the parcel lines are entered they are drawn on the screen Lines comprising the road are coded “21” as this generates cross road connections

© Geodata Australia Cross Road Connections Cross road connections are inserted by the program by entering road width at every point that a line code 21 changes direction

© Geodata Australia Parcel is Checked for Close and Accuracy

© Geodata Australia The Grouping Process  The previous lot remains on the screen  The new parcel spreadsheet appears  The new parcel is started at an existing point on the previous parcel.  This is repeated where possible and data entry of new lines is performed from the keyboard as shown on the following slide

© Geodata Australia Next Parcel Added The next parcel in the Group is added starting from a point on the previous parcel

© Geodata Australia This Process is Repeated for all the Parcels in the Plan

© Geodata Australia The Completed Group The group can now be adjusted by LSA and saved as an entity so It can be joined as a single unit to the adjoining Cadastral fabric

© Geodata Australia The LSA  Control is selected  Tolerances to be observed are set  The fit of the parcels to the control is checked – residuals displayed  The LSA is run and  The LSA result and report examined and accepted or rejected for further error correction

© Geodata Australia Control Selected Active control points are displayed in red and residuals indicate “fit” to control. Non- conforming control is made inactive

© Geodata Australia Tolerances for LSA Set Tolerances at which the LSA will terminate Plan structure may be preserved following LSA Location of LSA report file is set Click “Proceed” to run the LSA Tolerances at which the LSA will terminate Plan structure may be preserved following LSA Location of LSA report file is set Click “Proceed” to run the LSA

© Geodata Australia LSA Run and Report Generated The report gives maximum shifts of the co- ordinate values and identifies points where errors exist

© Geodata Australia Check Following LSA After the LSA the residuals in the active control points should be 0

© Geodata Australia Forcing Plan Structure  The LSA recalculated the co-ordinates of every point  This can have the effect of moving points from lines which are meant to be preserved  The structure of the plan can be preserved at the completion of the LSA.

© Geodata Australia Co-Ordinate Values & Plan Dimensions  It is important to note here that the purpose of the LSA is to calculate the co-ordinates of each point.  At no time does GeoCadastre change any of the survey observations recorded from the survey plans  Survey data is preserved unaltered for all time. Historical plans are included in the LSA

© Geodata Australia Example of Forcing Plan Structure 11// // //10443 Point 180 has been identified in the LSA as a line point being 0.252m off the line (boundary between Lot 11 and Lot 10) which is not intended by the surveyor to be the case

© Geodata Australia Forcing Plan Structure By forcing the plan structure Point 180 can be forced back onto the line it was moved from during the LSA

© Geodata Australia Point Moved to Line The LSA is run again and Point 180 is moved back onto the line

© Geodata Australia Orient to Image  A creek runs through the parcels and only parts of it have been fixed by survey – Lots 3A, 3B and part of Lot 7  We can link the cadastre to an image of the creek (plan or air photo) and  Digitise the creek giving it an accuracy value of 7 so it is excluded form the LSA

© Geodata Australia Orient to Image  As the creek is to be digitised it is of visual importance only – it has no mathematics associated with it and is shown for clarity only  We will therefore attach the digitised creek to Lot 16 only although it could be repeated for each individual lot affected

© Geodata Australia Start with DP10443.acs Lot 16 is selected from the parcel explorer window and image window called and the path to the image file – must be.bmp (the DP) is set

© Geodata Australia Image File is Displayed The image file is brought in behind the job

© Geodata Australia Orient to Image Orient to Image is selected from the drop down ZOOM Menu

© Geodata Australia Orient to Image The image is now scaled to the job by the program to allow points on the job to be matched with points on the image

© Geodata Australia Orient to Image Points on the image are then matched to the same point on the job and residuals give a measure of how well the 2 fit then hit “Accept”

© Geodata Australia Image and Job are Oriented The image and the job are now oriented so the creek can be inserted by digitising

© Geodata Australia Adding the Creek PArcel We can now create a separate lot representing the creek which we will attach to Lot 16 and create solely with mouse clicks

© Geodata Australia Digitising the Creek By zooming in on the image for a better view the creek position can be digitised with mouse clicks and the parcel line details are calculated by the program

© Geodata Australia Digitising the Creek By this process the creek is recorded according to the image used

© Geodata Australia The Creek Parcel Joined Normal join routines can now be employed to join the creek “parcel” to Lot 16 so it appears on all affected parcels

© Geodata Australia The Result of the Process  In the example above all the lots on a plan have been entered as a group  Adjusted by LSA  Identified errors and areas of bad data  Forced rigour of the geometry  Saved as a complete unit

© Geodata Australia The Result of the Process  The cadastral data recorded is now available for incorporation into an existing fabric or  For use as the base of a new fabric which can be built upon and added to  THE OBSERVED SURVEY DATA IS PRESERVED UNALTERED AND UNAFFECTED BY THE LSA

© Geodata Australia Adding Parcels by Appending  In the next example an adjacent plan will be recorded in the same way DP10443 was entered by grouping the parcels.  This plan will be saved as a separate entity and joined to DP10443 by appending the completed file

© Geodata Australia DP Joins DP10443 to the east

© Geodata Australia DP11823

© Geodata Australia Entry of Easement The pipe line easement is recorded on the plan as a centreline and width only

© Geodata Australia Generating Geometry from Easement Centreline After entering the centre line a tool is employed to generate the lines either side of the centre line

© Geodata Australia Creating Easement from Centre Line The bearings of the lines intersecting the easement Ø and the easement width and type are recorded

© Geodata Australia Easement Boundaries Created The program has inserted the lines forming the easement through the parcel

© Geodata Australia Grouping is Continued After recording the easement the grouping process is continued. Note the need to record the easement as an unclosed parcel

© Geodata Australia DP11823 Completed DP11823 completed adjusted and saved ready to append

© Geodata Australia The Append Process  Having entered the detail from DP11823 and  Adjusted it to local control by LSA  We need to begin the process of building a cadastral fabric by  Appending DP11823 to DP10443

© Geodata Australia Open the Base File The previously saved cadastral file DP10443 is opened

© Geodata Australia Select the File to Be Appended Browse to the file for DP11823 and select the desire options

© Geodata Australia DP11823 is now in the Parcel Explorer for DP10443 Now that the parcels for DP11823 are in the parcel explorer for DP10443 the 2 can be joined

© Geodata Australia Joining the 2 Groups When any of the DP11823 lots is selected for joining all the parcels in the group are selected and common points from the plan are connected Residuals at each join point check the accuracy of the fit

© Geodata Australia Joining of the 2 Datasets is Complete

© Geodata Australia The Combined Datasets are now Adjusted by LSA

© Geodata Australia Adjustment Results Examined and Accepted The 2 datasets have been joined and adjusted and are now ready for either joining to a larger group or being added to

© Geodata Australia The Result of the Process  2 separately constructed cadastral fabrics have been joined to form a single dataset  By grouping as you go the process of joining is greatly simplified  By adjusting small areas iteratively it is easier to identify and rectify data errors

© Geodata Australia The Geodata ESRI Connection  Geodata and ESRI have worked collaboratively to incorporate GeoCadastre into ArcMap as an extension to Survey Analyst which will be released to international markets circa Q1 2007, in ArcGIS 9.2  The Survey Analyst 9.2 will allow the storage of cadastral data in a geodatabase without any loss of mathematical integrity to the survey data.  SurveyXML™ has been jointly developed with ESRI as an interchange format to transport cadastral data to the geodatabase.

© Geodata Australia CAD data Text and Paper Documents - Data automation and maintenance - GIS analysis - Enterprise mapping requirements - Land records - Surveys Information System - Measurement-based Cadastre Maps, Plats Field Books Geodatabase Applications GIS data Imagery Survey Data (measurements) Field Measurements Other survey and engineering file formats Other survey and engineering file formats The ESRI Model for Application of GeoCadastre within Survey Analyst

© Geodata Australia Inquiries:  Roger Lee  Address:  P.O. Box 574  East Maitland  N.S.W   Tel:  Fax:  Mobile: